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        <a href="octant-module.html">Package&nbsp;octant</a> ::
        <a href="octant.sw-module.html">Package&nbsp;sw</a> ::
        Module&nbsp;salinity
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<h1 class="epydoc">Source Code for <a href="octant.sw.salinity-module.html">Module octant.sw.salinity</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-comment"># --- encoding: iso-8859-1 ---</tt> </tt>
<a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"><tt class="py-docstring">"""Seawater salinity module, providing salt and cond functions</tt> </tt>
<a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"><tt class="py-docstring">S = salt(R, T[, P]) -- Salinity    </tt> </tt>
<a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-docstring">R = cond(S, T[, P]) -- Conductivity ratio</tt> </tt>
<a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt class="py-docstring">Arguments:</tt> </tt>
<a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt class="py-docstring">    R = Conductivity ratio</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"><tt class="py-docstring">    S = Salinity</tt> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt class="py-docstring">    T = Temperature         [&#176;C]</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"><tt class="py-docstring">    P = Pressure,           [dbar = 10**4 Pa]</tt> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt class="py-docstring">Bj&#248;rn &#197;dlandsvik &lt;bjorn@imr.no&gt;, 07 November 2004</tt> </tt>
<a name="L15"></a><tt class="py-lineno"> 15</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line"> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt class="py-comment"># -------------------------------------------------------</tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_sal"></a><div id="_sal-def"><a name="L20"></a><tt class="py-lineno"> 20</tt> <a class="py-toggle" href="#" id="_sal-toggle" onclick="return toggle('_sal');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_sal">_sal</a><tt class="py-op">(</tt><tt class="py-param">XR</tt><tt class="py-op">,</tt><tt class="py-param">XT</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_sal-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_sal-expanded"><a name="L21"></a><tt class="py-lineno"> 21</tt>  <tt class="py-line">     </tt>
<a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line">    <tt class="py-name">a0</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.0080</tt> </tt>
<a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line">    <tt class="py-name">a1</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.1692</tt> </tt>
<a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line">    <tt class="py-name">a2</tt> <tt class="py-op">=</tt> <tt class="py-number">25.3851</tt> </tt>
<a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line">    <tt class="py-name">a3</tt> <tt class="py-op">=</tt> <tt class="py-number">14.0941</tt> </tt>
<a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line">    <tt class="py-name">a4</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">7.0261</tt> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line">    <tt class="py-name">a5</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.7081</tt> </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line">     </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line">    <tt class="py-name">b0</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.0005</tt> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line">    <tt class="py-name">b1</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0056</tt> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line">    <tt class="py-name">b2</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0066</tt> </tt>
<a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line">    <tt class="py-name">b3</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0375</tt> </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line">    <tt class="py-name">b4</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.0636</tt> </tt>
<a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line">    <tt class="py-name">b5</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0144</tt> </tt>
<a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line">     </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line">    <tt class="py-name">k</tt>  <tt class="py-op">=</tt>  <tt class="py-number">0.0162</tt> </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line"> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line">    <tt class="py-name">DS</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">XT</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-number">1</tt><tt class="py-op">+</tt><tt class="py-name">k</tt><tt class="py-op">*</tt><tt class="py-name">XT</tt><tt class="py-op">)</tt> <tt class="py-op">)</tt> <tt class="py-op">*</tt>        \ </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line">         <tt class="py-op">(</tt><tt class="py-name">b0</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b3</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b4</tt> <tt class="py-op">+</tt> <tt class="py-name">b5</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt> </tt>
<a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line"> </tt>
<a name="L41"></a><tt class="py-lineno"> 41</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">a0</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a3</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a4</tt> <tt class="py-op">+</tt> <tt class="py-name">a5</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt> <tt class="py-op">+</tt> <tt class="py-name">DS</tt> </tt>
</div><a name="L42"></a><tt class="py-lineno"> 42</tt>  <tt class="py-line"> </tt>
<a name="L43"></a><tt class="py-lineno"> 43</tt>  <tt class="py-line"><tt class="py-comment"># ---------------------------------------------------</tt> </tt>
<a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_dsal"></a><div id="_dsal-def"><a name="L45"></a><tt class="py-lineno"> 45</tt> <a class="py-toggle" href="#" id="_dsal-toggle" onclick="return toggle('_dsal');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_dsal">_dsal</a><tt class="py-op">(</tt><tt class="py-param">XR</tt><tt class="py-op">,</tt><tt class="py-param">XT</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_dsal-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_dsal-expanded"><a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line">     </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line">    <tt class="py-name">a1</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.1692</tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line">    <tt class="py-name">a2</tt> <tt class="py-op">=</tt> <tt class="py-number">25.3851</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line">    <tt class="py-name">a3</tt> <tt class="py-op">=</tt> <tt class="py-number">14.0941</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line">    <tt class="py-name">a4</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">7.0261</tt> </tt>
<a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line">    <tt class="py-name">a5</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.7081</tt> </tt>
<a name="L52"></a><tt class="py-lineno"> 52</tt>  <tt class="py-line"> </tt>
<a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line">    <tt class="py-name">b1</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0056</tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line">    <tt class="py-name">b2</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0066</tt> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line">    <tt class="py-name">b3</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0375</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line">    <tt class="py-name">b4</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.0636</tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line">    <tt class="py-name">b5</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">0.0144</tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line"> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line">    <tt class="py-name">k</tt>  <tt class="py-op">=</tt>  <tt class="py-number">0.0162</tt> </tt>
<a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line">     </tt>
<a name="L61"></a><tt class="py-lineno"> 61</tt>  <tt class="py-line">    <tt class="py-name">dDS</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">XT</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-number">1</tt><tt class="py-op">+</tt><tt class="py-name">k</tt><tt class="py-op">*</tt><tt class="py-name">XT</tt><tt class="py-op">)</tt> <tt class="py-op">)</tt> <tt class="py-op">*</tt>      \ </tt>
<a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line">          <tt class="py-op">(</tt><tt class="py-name">b1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b2</tt><tt class="py-op">*</tt><tt class="py-number">2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b3</tt><tt class="py-op">*</tt><tt class="py-number">3</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">b4</tt><tt class="py-op">*</tt><tt class="py-number">4</tt> <tt class="py-op">+</tt> <tt class="py-name">b5</tt><tt class="py-op">*</tt><tt class="py-number">5</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line">     </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">a1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a2</tt><tt class="py-op">*</tt><tt class="py-number">2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a3</tt><tt class="py-op">*</tt><tt class="py-number">3</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">a4</tt><tt class="py-op">*</tt><tt class="py-number">4</tt> <tt class="py-op">+</tt> <tt class="py-name">a5</tt><tt class="py-op">*</tt><tt class="py-number">5</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">XR</tt> <tt class="py-op">+</tt> <tt class="py-name">dDS</tt> </tt>
</div><a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line"> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line"><tt class="py-comment"># ---------------------------------------------</tt> </tt>
<a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_rt"></a><div id="_rt-def"><a name="L68"></a><tt class="py-lineno"> 68</tt> <a class="py-toggle" href="#" id="_rt-toggle" onclick="return toggle('_rt');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_rt">_rt</a><tt class="py-op">(</tt><tt class="py-param">T</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_rt-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_rt-expanded"><a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line">     </tt>
<a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line">    <tt class="py-name">c0</tt> <tt class="py-op">=</tt>  <tt class="py-number">0.6766097</tt> </tt>
<a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line">    <tt class="py-name">c1</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.00564e-2</tt> </tt>
<a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line">    <tt class="py-name">c2</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.104259e-4</tt> </tt>
<a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line">    <tt class="py-name">c3</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">6.9698e-7</tt> </tt>
<a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line">    <tt class="py-name">c4</tt> <tt class="py-op">=</tt>  <tt class="py-number">1.0031e-9</tt> </tt>
<a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line">     </tt>
<a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">c0</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">c3</tt> <tt class="py-op">+</tt> <tt class="py-name">c4</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt> </tt>
</div><a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line"> </tt>
<a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line"><tt class="py-comment"># ---------------------------------------------------</tt> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_c"></a><div id="_c-def"><a name="L80"></a><tt class="py-lineno"> 80</tt> <a class="py-toggle" href="#" id="_c-toggle" onclick="return toggle('_c');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_c">_c</a><tt class="py-op">(</tt><tt class="py-param">P</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_c-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_c-expanded"><a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line">     </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line">    <tt class="py-name">e1</tt> <tt class="py-op">=</tt>  <tt class="py-number">2.070e-5</tt> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line">    <tt class="py-name">e2</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">6.370e-10</tt> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line">    <tt class="py-name">e3</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.989e-15</tt> </tt>
<a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line">     </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-op">(</tt><tt class="py-name">e1</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">e2</tt> <tt class="py-op">+</tt> <tt class="py-name">e3</tt><tt class="py-op">*</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">P</tt> </tt>
</div><a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line"> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line"><tt class="py-comment"># ---------------------------------------------------</tt> </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_b"></a><div id="_b-def"><a name="L90"></a><tt class="py-lineno"> 90</tt> <a class="py-toggle" href="#" id="_b-toggle" onclick="return toggle('_b');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_b">_b</a><tt class="py-op">(</tt><tt class="py-param">T</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_b-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_b-expanded"><a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line">     </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line">    <tt class="py-name">d1</tt> <tt class="py-op">=</tt>  <tt class="py-number">3.426e-2</tt> </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line">    <tt class="py-name">d2</tt> <tt class="py-op">=</tt>  <tt class="py-number">4.464e-4</tt> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt>  <tt class="py-line">     </tt>
<a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-number">1.0</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">d1</tt> <tt class="py-op">+</tt> <tt class="py-name">d2</tt><tt class="py-op">*</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">T</tt> </tt>
</div><a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line"> </tt>
<a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line"><tt class="py-comment"># ---------------------------------------------------</tt> </tt>
<a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="_a"></a><div id="_a-def"><a name="L99"></a><tt class="py-lineno"> 99</tt> <a class="py-toggle" href="#" id="_a-toggle" onclick="return toggle('_a');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#_a">_a</a><tt class="py-op">(</tt><tt class="py-param">T</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_a-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_a-expanded"><a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line">     </tt>
<a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line">    <tt class="py-name">d3</tt> <tt class="py-op">=</tt>  <tt class="py-number">4.215e-1</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line">    <tt class="py-name">d4</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">3.107e-3</tt> </tt>
<a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line">     </tt>
<a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">d3</tt> <tt class="py-op">+</tt> <tt class="py-name">d4</tt><tt class="py-op">*</tt><tt class="py-name">T</tt> </tt>
</div><a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line"> </tt>
<a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line"><tt class="py-comment"># --------------------------------------------------</tt> </tt>
<a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="salt"></a><div id="salt-def"><a name="L108"></a><tt class="py-lineno">108</tt> <a class="py-toggle" href="#" id="salt-toggle" onclick="return toggle('salt');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#salt">salt</a><tt class="py-op">(</tt><tt class="py-param">R</tt><tt class="py-op">,</tt> <tt class="py-param">T</tt><tt class="py-op">,</tt> <tt class="py-param">P</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="salt-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="salt-expanded"><a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line">    <tt class="py-docstring">"""Compute salinity from conductivity, temperature, and pressure</tt> </tt>
<a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line"><tt class="py-docstring">    Usage: salt(R, T, [P])</tt> </tt>
<a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line"><tt class="py-docstring">    Input:</tt> </tt>
<a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line"><tt class="py-docstring">        R = Conductivity ratio</tt> </tt>
<a name="L115"></a><tt class="py-lineno">115</tt>  <tt class="py-line"><tt class="py-docstring">        T = Temperature        [&#176;C]</tt> </tt>
<a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line"><tt class="py-docstring">        P = Pressure,          [dbar = 10**4 Pa]</tt> </tt>
<a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line"><tt class="py-docstring">    P is optional, with default value zero</tt> </tt>
<a name="L118"></a><tt class="py-lineno">118</tt>  <tt class="py-line"><tt class="py-docstring">      </tt> </tt>
<a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line"><tt class="py-docstring">    Output:</tt> </tt>
<a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line"><tt class="py-docstring">        S = Salinity           [PSS-78]</tt> </tt>
<a name="L121"></a><tt class="py-lineno">121</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line">     </tt>
<a name="L124"></a><tt class="py-lineno">124</tt>  <tt class="py-line">    <tt class="py-name">DT</tt> <tt class="py-op">=</tt> <tt class="py-name">T</tt> <tt class="py-op">-</tt> <tt class="py-number">15.0</tt> </tt>
<a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line">    <tt class="py-name">RT</tt> <tt class="py-op">=</tt> <tt class="py-name">R</tt><tt class="py-op">/</tt><tt class="py-op">(</tt><tt class="py-name">_rt</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-number">1.0</tt> <tt class="py-op">+</tt> <tt class="py-name">_c</tt><tt class="py-op">(</tt><tt class="py-name">P</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-op">(</tt><tt class="py-name">_b</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt> <tt class="py-op">+</tt> <tt class="py-name">_a</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">R</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line">    <tt class="py-name">RT</tt> <tt class="py-op">=</tt> <tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">RT</tt><tt class="py-op">)</tt><tt class="py-op">**</tt><tt class="py-number">0.5</tt> </tt>
<a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line">     </tt>
<a name="L128"></a><tt class="py-lineno">128</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">_sal</tt><tt class="py-op">(</tt><tt class="py-name">RT</tt><tt class="py-op">,</tt><tt class="py-name">DT</tt><tt class="py-op">)</tt> </tt>
</div><a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line"> </tt>
<a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line"><tt class="py-comment"># -------------------------------------------------</tt> </tt>
<a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="cond"></a><div id="cond-def"><a name="L132"></a><tt class="py-lineno">132</tt> <a class="py-toggle" href="#" id="cond-toggle" onclick="return toggle('cond');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="octant.sw.salinity-module.html#cond">cond</a><tt class="py-op">(</tt><tt class="py-param">S</tt><tt class="py-op">,</tt> <tt class="py-param">T</tt><tt class="py-op">,</tt> <tt class="py-param">P</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="cond-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="cond-expanded"><a name="L133"></a><tt class="py-lineno">133</tt>  <tt class="py-line">    <tt class="py-docstring">"""Compute conductivity ratio from salinity, temperature, and pressure</tt> </tt>
<a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L135"></a><tt class="py-lineno">135</tt>  <tt class="py-line"><tt class="py-docstring">    Usage: cond(S, T, [P])</tt> </tt>
<a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line"><tt class="py-docstring">    Input:</tt> </tt>
<a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line"><tt class="py-docstring">        S = Salinity      [PSS-78]</tt> </tt>
<a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line"><tt class="py-docstring">        T = Temperature   [&#176;C]</tt> </tt>
<a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line"><tt class="py-docstring">        P = Pressure,     [dbar = 10**4 Pa]</tt> </tt>
<a name="L141"></a><tt class="py-lineno">141</tt>  <tt class="py-line"><tt class="py-docstring">    P is optional, with default value zero</tt> </tt>
<a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line"><tt class="py-docstring">      </tt> </tt>
<a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line"><tt class="py-docstring">    Output:</tt> </tt>
<a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line"><tt class="py-docstring">        R = Conductivity ratio</tt> </tt>
<a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line">     </tt>
<a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line">    <tt class="py-name">DT</tt> <tt class="py-op">=</tt> <tt class="py-name">T</tt><tt class="py-op">-</tt><tt class="py-number">15.0</tt> </tt>
<a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line">    <tt class="py-name">RT</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">S</tt><tt class="py-op">/</tt><tt class="py-number">35.0</tt><tt class="py-op">)</tt><tt class="py-op">**</tt><tt class="py-number">0.5</tt> </tt>
<a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line">    <tt class="py-name">SI</tt> <tt class="py-op">=</tt> <tt class="py-name">_sal</tt><tt class="py-op">(</tt><tt class="py-name">RT</tt><tt class="py-op">,</tt><tt class="py-name">DT</tt><tt class="py-op">)</tt> </tt>
<a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line">    <tt class="py-comment"># Iteration</tt> </tt>
<a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">for</tt> <tt class="py-name">n</tt> <tt class="py-keyword">in</tt> <tt class="py-name">xrange</tt><tt class="py-op">(</tt><tt class="py-number">100</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line">        <tt class="py-name">RT</tt> <tt class="py-op">=</tt> <tt class="py-name">RT</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">S</tt><tt class="py-op">-</tt><tt class="py-name">SI</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-name">_dsal</tt><tt class="py-op">(</tt><tt class="py-name">RT</tt><tt class="py-op">,</tt><tt class="py-name">DT</tt><tt class="py-op">)</tt> </tt>
<a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">        <tt class="py-name">SI</tt> <tt class="py-op">=</tt> <tt class="py-name">_sal</tt><tt class="py-op">(</tt><tt class="py-name">RT</tt><tt class="py-op">,</tt><tt class="py-name">DT</tt><tt class="py-op">)</tt> </tt>
<a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">            <tt class="py-name">DELS</tt> <tt class="py-op">=</tt> <tt class="py-name">max</tt><tt class="py-op">(</tt><tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">SI</tt><tt class="py-op">-</tt><tt class="py-name">S</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L157"></a><tt class="py-lineno">157</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt> <tt class="py-name">TypeError</tt><tt class="py-op">:</tt> <tt class="py-comment"># Not sequence, i.e. scalar S</tt> </tt>
<a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line">            <tt class="py-name">DELS</tt> <tt class="py-op">=</tt> <tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">SI</tt><tt class="py-op">-</tt><tt class="py-name">S</tt><tt class="py-op">)</tt> </tt>
<a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">DELS</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">1.0E-4</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line">            <tt class="py-keyword">break</tt> </tt>
<a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line"> </tt>
<a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line">    <tt class="py-name">RTT</tt> <tt class="py-op">=</tt> <tt class="py-name">_rt</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-name">RT</tt><tt class="py-op">*</tt><tt class="py-name">RT</tt> </tt>
<a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line">    <tt class="py-name">AT</tt> <tt class="py-op">=</tt> <tt class="py-name">_a</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt> </tt>
<a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line">    <tt class="py-name">BT</tt> <tt class="py-op">=</tt> <tt class="py-name">_b</tt><tt class="py-op">(</tt><tt class="py-name">T</tt><tt class="py-op">)</tt> </tt>
<a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line">    <tt class="py-name">CP</tt> <tt class="py-op">=</tt> <tt class="py-name">_c</tt><tt class="py-op">(</tt><tt class="py-name">P</tt><tt class="py-op">)</tt> </tt>
<a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line">    <tt class="py-name">CP</tt> <tt class="py-op">=</tt> <tt class="py-name">RTT</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-name">CP</tt> <tt class="py-op">+</tt> <tt class="py-name">BT</tt><tt class="py-op">)</tt> </tt>
<a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line">    <tt class="py-name">BT</tt> <tt class="py-op">=</tt> <tt class="py-name">BT</tt> <tt class="py-op">-</tt> <tt class="py-name">RTT</tt><tt class="py-op">*</tt><tt class="py-name">AT</tt> </tt>
<a name="L168"></a><tt class="py-lineno">168</tt>  <tt class="py-line"> </tt>
<a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line">    <tt class="py-name">R</tt> <tt class="py-op">=</tt> <tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">BT</tt><tt class="py-op">*</tt><tt class="py-name">BT</tt> <tt class="py-op">+</tt> <tt class="py-number">4.0</tt><tt class="py-op">*</tt><tt class="py-name">AT</tt><tt class="py-op">*</tt><tt class="py-name">CP</tt><tt class="py-op">)</tt><tt class="py-op">**</tt><tt class="py-number">0.5</tt> <tt class="py-op">-</tt> <tt class="py-name">BT</tt> </tt>
<a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line">     </tt>
<a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-number">0.5</tt><tt class="py-op">*</tt><tt class="py-name">R</tt><tt class="py-op">/</tt><tt class="py-name">AT</tt> </tt>
</div><a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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